cubicweb-seda #15524215 Backport seda version handling from saem [validation pending]

e.g. can't export profile to 1.0 if first level archive unit have no access rule.

  • diagnostic tab on transfer
  • warning sign in the tree where are the problems ?
done in0.5.0
load left0.000
closed by<not specified>
patchAdd an export view dealing with cases where the requested format isn't supported by the profile [applied]Add basic SEDA compatibility diagnosis tool [applied]